google classroom error turning in assignment

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1. Disable student turning in empty assignments in GoogleClass

   

2. Disable student turning in empty assignments in GoogleClass

   

3. Disable student turning in empty assignments in GoogleClass

   

4. Prevent Students from Turning In Assignment Late in Google Classroom

   

5. Classroom ErrorDomain Error 104

   

6. What should I do if I receive an error “Error while posting assignment to Google Classroom”